1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
#include <stdio.h>
#include <stdlib.h>
void PrintUsage(char *nam)
{
fprintf(stderr, "\n\nUSAGE: %s -f <filename> [-s <nsec>]\n\n", nam);
exit(-1);
}
void GetFlags(int nargs, char **args, int *nsec, char **fnam)
{
int i;
*nsec = 5;
*fnam = NULL;
for (i=1; i < nargs; i++)
{
if (args[i][0] != '-') PrintUsage(args[0]);
switch(args[i][1])
{
case 'f':
*fnam = args[++i];
break;
case 's':
*nsec = atoi(args[++i]);
break;
default:
PrintUsage(args[0]);
}
}
if (*fnam == NULL) PrintUsage(args[0]);
}
int WaitForIt(int nsec, char *fnam)
/*
* only probe for file once every 1/5 of a second to avoid beating the crap
* out of NFS server
*/
{
FILE *fp;
double t0, t1, dsec=(double)nsec, dwait;
double ATL_walltime(void);
fp = fopen(fnam, "r");
if (!fp)
{
t0 = ATL_walltime();
do
{
t1 = ATL_walltime();
while(ATL_walltime()-t1 < 0.2);
if (ATL_walltime()-t0 > dsec) return(1);
fp = fopen(fnam, "r");
}
while(!fp);
}
fclose(fp);
return(0);
}
int main(int nargs, char **args)
/*
* This routine waits at last nsecs for a file to appear; used to get
* around NFS probs, particularly when cross-compiling
*/
{
int nsec, i;
char *fnam;
GetFlags(nargs, args, &nsec, &fnam);
i = WaitForIt(nsec, fnam);
if (i) fprintf(stderr, "\n\nTimeout waiting for file %s!!\n\n", fnam);
return(0);
}
|
